The sum of two numbers is 82. The difference is 16. What are the two numbers?

Answer 1

x + y = 82
x - y = 16

x = 82 - y

82 - y - y = 16

-2y = - 66

y = 33

x + 33 = 82

x = 49

Answer 2

x+y=82
x-y = 16

add them to solve for x
subtract them to solve for y